| | Layton, UT | Holladay, UT | United States |
| Population | 80,858 | 31,738 | 329,725,481 |
| Female Population | 49.3% | 50.5% | 50.5% |
| Male Population | 50.7% | 49.5% | 49.5% |
| Median Age | 31.5 | 39.7 | 38.4 |
| space3 | | | |
| Population - 2010 | 67,817 | 30,139 | 309,327,143 |
| Population - 2000 | 58,474 | 14,561 | 285,036,114 |
| Population - 1990 | 41,784 | 26,243 | 251,960,433 |
| Pop. 2000 to Now | 35.1% | 105.2% | 15.6% |
| Pop. 1990 to Now | 89.1% | 13.9% | 30.8% |
| space4 | | | |
| Population Density | 3,619.3 | 3,740.0 | 93.4 |
| Land Area | 22.3 | 8.5 | 3,531,905.4 |
| Water Area | 0.2 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Layton, UT | Holladay, UT | United States |
| Age 0 to 4 | 7.5% | 5.7% | 5.9% |
| Age 5 to 9 | 9.0% | 7.3% | 6.1% |
| Age 10 to 14 | 8.4% | 7.4% | 6.6% |
| Age 15 to 17 | 5.3% | 4.7% | 3.9% |
| Age 18 to 20 | 4.7% | 2.5% | 4.0% |
| Age 21 to 24 | 5.1% | 4.9% | 5.2% |
| Age 25 to 34 | 14.8% | 11.3% | 13.8% |
| Age 35 to 44 | 15.5% | 13.6% | 12.9% |
| Age 45 to 54 | 11.2% | 11.9% | 12.6% |
| Age 55 to 59 | 4.5% | 5.6% | 6.7% |
| Age 60 to 64 | 4.8% | 6.6% | 6.3% |
| Age 65 to 74 | 6.0% | 10.5% | 9.6% |
| Age 75 to 84 | 2.7% | 5.5% | 4.5% |
| Age 85 and over | 0.6% | 2.4% | 1.9% |
| space1 | | | |
| Race | | | |
| | Layton, UT | Holladay, UT | United States |
| White | 78.4% | 87.7% | 59.4% |
| Black | 1.6% | 1.4% | 12.2% |
| Asian | 1.8% | 2.4% | 5.6% |
| Native American | 0.3% | 0.2% | 0.6% |
| Hawaiian, Pacific Islander | 1.0% | 0.4% | 0.2% |
| Other | 0.2% | 0.3% | 0.4% |
| Two or More Races | 3.3% | 2.3% | 3.2% |
| Hispanic | 13.3% | 5.4% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Layton, UT | Holladay, UT | United States |
| Married Population | 57.8% | 56.1% | 49.8% |
| Currently Married | 56.0% | 55.2% | 48.0% |
| Married but Separated | 1.7% | 0.9% | 1.8% |
| Single Population | 42.2% | 43.9% | 50.2% |
| Never Married | 30.4% | 27.6% | 33.8% |
| Divorced | 8.3% | 11.9% | 10.8% |
| Widowed | 3.5% | 4.5% | 5.6% |
| space5 | | | |
| Household Size | 3.11 | 2.67 | 2.60 |
| Households | 25,958 | 11,846 | 124,010,992 |
| Family Households | 19,825 | 8,369 | 80,755,759 |
| Married couple, w/children | 42.7% | 34.6% | 30.5% |
| Married couple, no children | 38.2% | 43.9% | 42.9% |
| Non Family Households | 6,133 | 3,477 | 43,255,233 |
| Single householder, w/children | 12.3% | 11.7% | 15.8% |
| Single householder, no children | 6.8% | 9.8% | 10.8% |